On Wed, May 17, 2017 at 8:58 AM, Christoph Lameter <c...@linux.com> wrote: > The reason to disable interrupts seems to be to avoid switching > to a different processor while handling per cpu data using > individual loads and stores. If we use per cpu RMV primitives > we will not have to disable interrupts.
I like this, except that those primitives can be quite expensive, I think, and they're being called in a loop. What if you first did a this_cpu_read() to see if the value in the cache slot might be useful before doing the heavyweight exchange? --Andy
